XINCOL DC 24V to DC12V 40A 480W Buck Voltage Reducer DC/DC Car Truck Power Converter Step-Down Transformer Regulator with Built-in Fan Full Protections RAM Memory and Inline Fuse Car Power Supply Transformer allow you to convert DC 24 voltage to DC 12V voltage.Brand new and high quality,more than 90% power conversion efficiency Built-in over/under voltage input, overload, overheat, and short circuit full protection Ultra compact size ,more efficient and reliable Operating Stable and reliable performance Auto-recovery when device is back to normal operating Simple to install